Methods and systems for regenerating and pretreating oxides of manganese and precipitation of oxides of manganese from manganese salt solutions. Oxides of manganese, a slurry containing oxides of manganese or manganese salt solutions are mixed with heated aqueous oxidizing solutions and processed in...http://www.google.de/patents/US7419637?utm_source=gb-gplus-sharePatent US7419637 - Oxides of manganese processed in continuous flow reactors
